Mostly to highlight IC from OOC speech.
No. I do however employ a "different" voice from my normal everyday talking style so IC language is distinct. I usually only make minor changes so I can have a greater selection of "voices" in case the PCs are interacting with multiple NPCs simultaneously. More often than not a "voice" is simply a change in pitch, tone, cadence, or pattern of speech. Sometimes for "really important" NPCs I will use the "bad impression" method to make sure that the NPC "voice" is truly distinct.
My "regular voice" is used exclusively for OOC speech.
I preface every segment of IC speech with <[PC Name] says "(whatever)">.
This thread is funny timing. A few days ago I finally watched my first ever Actual Play YT video! Mind you, not "the big one" cause I was turned off of that particular group early on. I was actually thinking about posting about my experience, so yeah, interesting timing.
Anyway, one of the things I was going to mention in the post I've been thinking about making was the "funny voices" thing, or more importantly, the lack thereof. So, several of the AP I watched had a cast that all did "funny voices" for IC speech. The quality is hit and miss as a few people went a little overboard which made their IC speech hard to understand, but all in all, it made for a great experience because it's super easy to differentiate between IC and OOC speech. A couple of groups were a mixed bag with only some of the cast doing voices, which led to some confusion on my part (and some fellow cast) as to what actually was IC speech. There was also one group in which no one did any "funny voice" stuff at all, with only a single cast member that would preface IC speech with a "PC says" note. Frankly, that particular AP was confusing and hard to follow at times (not just for me but also for the cast) simply because it was literally impossible to differentiate IC from OOC speech. In fact, "did PC say that?" was an overly repeated question throughout the entire video. This recent experience definitely highlighted the usefulness of the "funny voice" as a tool to quickly and easily differentiate between IC and OOC speech.
As a final note, in regards to the "embarrassing myself" aspect of doing voices, especially in public or in front of strangers, never happens. I'm old enough to have lived through a time where my love of "nerd stuff" resulted in me being bullied and ostracized. The idea that I would, in this new and amazing time where "nerd stuff" is cool, be embarrassed by it is mind boggling. Nerd it up fools! Besides, the more I "ham it up" with "funny voices" and expressive gesturing, the more relaxed other participants become, often joing me in the fun!
Great topic for a thread! Cheers!